Courtesy of the Essex County Sheriff's OfficeAuthorities released this sketch drawing of a man suspected of impersonating a police officer and sexually assaulting a woman in a Newark park.

NEWARK — A $2,500 cash reward is being offered for information leading to the arrest of a man suspected of impersonating a police officer in a Newark park and then sexually assaulting a woman, officials said Friday.

The woman told authorities the man followed her on April 17 in a section of Branch Brook Park, then flashed some sort of identification and called himself an officer before ordering her to a location where he assaulted her, Essex County Sheriff Armando Fontoura said.

The man is in his 30s, is between 6-foot-1 and 6-foot-3 and weighs about 225 pounds, he said. He has short, buzzed black hair and uses a thin goatee, he said.

Anybody with information should contact the Essex County Prosecutor's Office at (973) 753-1111 or the tip line at 1-877-847-7432.